There is a reason mindfulness practices spend so much time trying to get us back to the present moment, it is laying the foundation for all things yet to come.
As someone who is prone to worrying about the future. I know all too well that it is very easy to get caught up in all the way things go wrong down the line, and forget to pay attention to the what is actually happening in the present moment. Why is the present so important? Because it is the only moment where we actually have any control.
This quote provides comfort, because it is a reminder, that by living in the moment and handling things as they arise, you are already paving the way to a great future. So stop worrying about what could (or could not) possibly happen, and focus your energy on what is actually happening right now.
The moment is now!